21062362660 has 12 divisors (see below), whose sum is σ = 44230961628. Its totient is φ = 8424945056.

The previous prime is 21062362649. The next prime is 21062362663. The reversal of 21062362660 is 6626326012.

It can be written as a sum of positive squares in 2 ways, for example, as 11721526756 + 9340835904 = 108266^2 + 96648^2 .

It is not an unprimeable number, because it can be changed into a prime (21062362663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526559047 + ... + 526559086.

It is an arithmetic number, because the mean of its divisors is an integer number (3685913469).

Almost surely, 2^21062362660 is an apocalyptic number.

21062362660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21062362660 is an abundant number, since it is smaller than the sum of its proper divisors (23168598968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21062362660 is a wasteful number, since it uses less digits than its factorization.

21062362660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053118142 (or 1053118140 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 21062362660 its reverse (6626326012), we get a palindrome (27688688672).

The spelling of 21062362660 in words is "twenty-one billion, sixty-two million, three hundred sixty-two thousand, six hundred sixty".